Indeed, but Britain is probably the other extreme. I believe there is only one country that could've produced magnificent material such as Monty Python or Fawlty Towers ;).
You could say that something like "Seinfeld" (and "Curb Your Enthusiasm") is more the product of a very unusual subculture (in fact, this is the basis for much of the humor, how poorly new yorkers fit in the rest of US culture), but keep in mind Seinfeld had the highest ratings of any sitcom in US history, so the appeal is obviously very broad.
Incidentally, I wouldn't regard Monty Python as being very representative of "natural" British humor - I'd probably suggest Al Murray in his "Pub Landlord" persona to be far more like the comedy you are likely to encounter in real life (or Frankie Boyle for us Scots).
update: searched a bit, cannot find any supporting evidence for bioh42_2's statement.
Not always intended as sarcastic, but:
The main body of the news report tends to use the renarrative correctly - but sometimes, again, it is intentionally avoided. (...) This is because, due to its ambiguity, the renarrative in such cases could be perceived as a passing of judgement or expression of doubt by the reporter...